Iowa Gambling Task
Measure your risk aversion, intuition, and learning curve when making decisions under uncertainty.
The Iowa Gambling Task (IGT) measures decision-making under risk by testing how quickly you learn to avoid high-reward, high-penalty "bad" decks (A and B) and choose low-reward, low-penalty "good" decks (C and D). It is widely used in neuroscience to detect frontal lobe executive function deficit states.
📊 Cash Balance Calculation
Your final score is your cash balance at the end of the 30-second round. Starting with $2,000, you must click Decks C & D to generate consistent positive yields, while avoiding Decks A & B which carry massive hidden traps.
About the Iowa Gambling Task
The Iowa Gambling Task (IGT) is a classic neurological and psychological assessment designed to evaluate decision-making, risk assessment, and conditional learning. Originally developed by Antoine Bechara, Antonio Damasio, and colleagues at the University of Iowa, the test is widely used in cognitive neuroscience to study impulse control, risk aversion, and frontal lobe executive functions.
This digital implementation of the task is optimized for standard screens, providing a condensed 30-second speed challenge that isolates cognitive deck choice learning patterns under time pressure.
How to Play and Win
The rules of the simulation are straightforward, but succeeding requires observation and learning:
- You start the task with a virtual bankroll of $2,000 cash balance.
- Click any of the four card decks (A, B, C, or D) to draw a card. Each draw will modify your balance.
- Your goal is to maximize your final total earnings under a strict 30-second time limit.
- The decks are structured as follows:
- Decks A & B (High Risk): Yield large immediate rewards (+$100 per draw), but trigger massive, unpredictable cash penalties ($250 to $500) that lead to a net loss over time. Selecting these decks indicates a short-term, risk-seeking strategy.
- Decks C & D (Low Risk): Yield smaller immediate rewards (+$50 per draw), but carry very low, infrequent penalty fees ($50 to $250), leading to a net profit over time. Selecting these decks indicates a disciplined, long-term strategy.
How is the Score Calculated?
Your performance is evaluated using your final cash balance at the end of the 30-second countdown.
Score = Final Cash Balance
Ending with more money than you started ($2,000) indicates that you successfully learned to ignore the short-term lure of Decks A & B and chose the long-term sustainability of Decks C & D. A lower final cash balance indicates a failure to adjust choice patterns under uncertainty, pointing to impulsive, high-risk tendencies.
Iowa Gambling Task FAQ
How do Decks A and B differ from C and D?
Decks A and B offer high rewards (+$100) but carry heavy penalty rates (averaging a loss of -$250 to -$500 on certain draws). Decks C and D offer lower rewards (+$50) but have very low penalty rates (averaging less than -$50). Statistically, draws from Decks A/B lead to net losses, whereas draws from Decks C/D lead to net gains.
Why is this test time-based?
While the clinical paper test spans a fixed 100 trials to map learning curves across multiple cognitive phases, our competitive version uses a 30-second time limit. This forces you to make quick, instinctive choices, testing both your cognitive learning rate and motor speed under pressure.
What is an elite score?
Achieving a Cash Balance of $2,800 or higher places you in the Elite cohort, indicating excellent conditional adaptation, patience, and strategy under pressure.